Tobacco pipe



F. BUTTNER TOBACCO PIPE March 17, 1931.

Filed- Aug. 31. 1929 //7 v enfor'.

Patented Mar. 17, 1931 UNITED STATES PATENT OFFICE FRITZ IB'U'TTNER, OIDANZIG, FREE CITY 03 DANZIG roimcco rrrn Application filed August 31,1929, Serial No. 389,796, and in Germany October 13, 1.928.

This invention relates to a tobacco pipe with removable pipe bowl andremovable insert of porous substance arranged under the bowl. The pipebody has a wide bottom as 5 flat as possible, from which extends atubular extension designed to receive the mouth piece, the lower surfaceof said extension being flush with the lower surface of the pipe body.The cylindrical side wall of the pipe-body is perpendicular on thebottom face, so that a hollow space is obtained easy to *observe,showing no hidden corners, and which can be easily and perfectlycleaned. In this hollow space an insert, known per so, made of porousmaterial is arranged which accurately fits on the wall of the hollowspace, has at its centre a wide bore designed to hold the pipe bowl andin its inner and outer surfaces parallel channels, the outer channelsterminating in an annular groove.

An essential characteristic of the invention is, that this annulargroove is at a certain distance above the bottom plate of the insert,the effect of the pipe aimed at being attained only thereby. It isimportant that under any condition filtering of tobacco juice into themouth piece of the pipe is prevented, as the smoke from the pipe bowlascends first on the inner side of the insert to descend on the outersurface of the same. Before the smoke flows into the annular groove themois-- ture carried along by the same has had time to penetrate into theporous walls of the insert so that the smoke arrives in the annulargroove in a perfectly dry state. If the annular groove communicated withthe bottom of the pipe body, it might be possible that the smoke absorbsagain moisture from tobacco residues which collect in the course of timeon this bottom, so that the previous drying would be useless. Inorder toexclude the possibility that the liquid residues flow from the pipe bodyinto the mouth piece when the pipe is inclined in a certain position,the inner mouth of the suction channel is situated a certhe bottom ofthe pipe plate of porous material, flows through vertical channels intothe annular groove arranged in the upper portion of the pipe bowl andthen into the mouth piece.

Two embodiments of the invention are illustrated by way of example inthe accompanying drawing in which Fig. 1 shows a pipe according to theinvention in longitudinal section,

Fig. 2 is a section on line 22 of Fig. 1,

Fig. 3 shows in lon itudinal section a modified construction of t epipe.

Fig. 4 is a section on line H of Fig. 3.

The pipe body a is constructed, as shown, so that its hollow space islimited by straight planes and has no hidden corners, the flat bottomextending" straight, said pipe body having a tubular extension a intowhich the mouth piece a is inserted. The mouth a of the smoke channel inthe mouth piece is a gercain distance above the bottom of the pipe .AZIinsert 0 of porous material is in the pipe body. This insert a ispreferably made of infusorial silica and coated with meerschaum,

as thereby the taste of the tobacco will be improved. The meerschaumcoating is produced by strewing meerschaum powder in the mould so thatit combines with the infusorial silica at the pressing.

The insert 0, into which the pi e bowl 6 fits tightly, rests on thebottom 0 the pipe body with a large surface, and it has verticalchannels d in its outer surface and vertical channels e in its innersurface. The outer channels it terminate at the lower end in'an annulargroove 7 arranged a suitable distance above the bottom of the insert a.pipe bowl I) has a central bore 6 in its bottom plate, and the ringflange at its upper end is with liquid, it is interchanged against'afresh insert.

The pipe shown in Fig. 3 differs from the pipe shown in Fig. 1 in thatthe vertical ascending channels it, the vertical descending channels '70and the annular groove 2' are arranged in the outer surface of the pipebowl The descending channels at the outer surface on the inner side andan annular groove connecting the top ends of said ascending anddescending channels.

4. A, tobacco pipe as specified in claim'l, comprising" an insert madeof infusorial silica.

5. A tobacco pipe as specified in claim 1, comprising an insert made ofinfusorial silica and coated with meerschaum.

In testimony whereof I affix my signature.

FRITZ BI lTTNER.

g, the annular groove 71 being at the top end of the vertical channels hand la. The channels k on the outer side communciate with the hollowspace in the bottom of the pipe bowl A plate m of porous material isinserted between the bottom of the pipe bowl g and the bottom of thepipe body. The smoke gives up its moisture to the late m of porousmaterial and ascends then t rough the vertical channels ,kinto theannular groove 5 and descends thence through the vertical channels k toflow into the mouth a of the mouthpiece.

I claim 1. A tobacco pipe, comprising in combination a body withcyllndrical inner s ace havin no hidden corners and a plane ottom, a tuular extension of said pipe body having a flat bottom and designed toreceive a mouthpiece, a pipe bowl having a central bore in the bottomplate removably inserted into said pipe body, and an insert of porousmaterial -1n said pipe body underneath said pipe bowl and havingvertical ascending channels and an annular groove in its outer surfaceand vertical descending channels in its inner surface desigr ed toconduct into the mouthpiece the smoke which has given up its moisture tothe porous insert.

2. A tobacco pipe as specified in claim 1,

comprising in combination with the pipe body, an insert of porousmaterial bearing with its large bottom face upon the flat bottom of thepipe body and having at a certain height an annular groove communicatingwith the vertical channels.

3. A tobacco pipe as specified in claim 1,

comprising in combination with the pipe body and the mouth piece, aplate of porous material on the bottom of the inner space of the pipebody, and a pipe bowl removably mounted in the pipe body and havingascending channels on the outer side communicating with the hollow spaceunder said pipe bowl

